Whistle purse.

It’s a modern, stylish purse or handbag where your cards, money, beauty and other stuff can be stored simple and you can find anything back by it’s screen on top that shows you in 3d where a specific card is located. While everything needs to be equipped with RFID tags, the purse itself can be located via an app or by simply whistling, than it returns a sound, so you can locate it.